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linux/drivers/regulator/wm8350-regulator.c
Douglas Anderson 259b93b21a
regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in 4.14 
Probing of regulators can be a slow operation and can contribute to
slower boot times. This is especially true if a regulator is turned on
at probe time (with regulator-boot-on or regulator-always-on) and the
regulator requires delays (off-on-time, ramp time, etc).

While the overall kernel is not ready to switch to async probe by
default, as per the discussion on the mailing lists [1] it is believed
that the regulator subsystem is in good shape and we can move
regulator drivers over wholesale. There is no way to just magically
opt in all regulators (regulators are just normal drivers like
platform_driver), so we set PROBE_PREFER_ASYNCHRONOUS for all
regulators found in 'drivers/regulator' individually.

Given the number of drivers touched and the impossibility to test this
ahead of time, it wouldn't be shocking at all if this caused a
regression for someone. If there is a regression caused by this patch,
it's likely to be one of the cases talked about in [1]. As a "quick
fix", drivers involved in the regression could be fixed by changing
them to PROBE_FORCE_SYNCHRONOUS. That being said, the correct fix
would be to directly fix the problem that caused the issue with async
probe.

The approach here follows a similar approach that was used for the mmc
subsystem several years ago [2]. In fact, I ran nearly the same python
script to auto-generate the changes. The only thing I changed was to
search for "i2c_driver", "spmi_driver", and "spi_driver" in addition
to "platform_driver".

[1] https://lore.kernel.org/r/06db017f-e985-4434-8d1d-02ca2100cca0@sirena.org.uk
[2] https://lore.kernel.org/r/20200903232441.2694866-1-dianders@chromium.org/

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230316125351.1.I2a4677392a38db5758dee0788b2cea5872562a82@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-03-20 13:11:25 +00:00

1333 lines
33 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
//
// wm8350.c -- Voltage and current regulation for the Wolfson WM8350 PMIC
//
// Copyright 2007, 2008 Wolfson Microelectronics PLC.
//
// Author: Liam Girdwood
// linux@wolfsonmicro.com
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/mfd/wm8350/core.h>
#include <linux/mfd/wm8350/pmic.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
/* Maximum value possible for VSEL */
#define WM8350_DCDC_MAX_VSEL 0x66
/* Microamps */
static const unsigned int isink_cur[] = {
4,
5,
6,
7,
8,
10,
11,
14,
16,
19,
23,
27,
32,
39,
46,
54,
65,
77,
92,
109,
130,
154,
183,
218,
259,
308,
367,
436,
518,
616,
733,
872,
1037,
1233,
1466,
1744,
2073,
2466,
2933,
3487,
4147,
4932,
5865,
6975,
8294,
9864,
11730,
13949,
16589,
19728,
23460,
27899,
33178,
39455,
46920,
55798,
66355,
78910,
93840,
111596,
132710,
157820,
187681,
223191
};
/* turn on ISINK followed by DCDC */
static int wm8350_isink_enable(struct regulator_dev *rdev)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int isink = rdev_get_id(rdev);
switch (isink) {
case WM8350_ISINK_A:
switch (wm8350->pmic.isink_A_dcdc) {
case WM8350_DCDC_2:
case WM8350_DCDC_5:
wm8350_set_bits(wm8350, WM8350_POWER_MGMT_7,
WM8350_CS1_ENA);
wm8350_set_bits(wm8350, WM8350_CSA_FLASH_CONTROL,
WM8350_CS1_DRIVE);
wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
1 << (wm8350->pmic.isink_A_dcdc -
WM8350_DCDC_1));
break;
default:
return -EINVAL;
}
break;
case WM8350_ISINK_B:
switch (wm8350->pmic.isink_B_dcdc) {
case WM8350_DCDC_2:
case WM8350_DCDC_5:
wm8350_set_bits(wm8350, WM8350_POWER_MGMT_7,
WM8350_CS2_ENA);
wm8350_set_bits(wm8350, WM8350_CSB_FLASH_CONTROL,
WM8350_CS2_DRIVE);
wm8350_set_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
1 << (wm8350->pmic.isink_B_dcdc -
WM8350_DCDC_1));
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
return 0;
}
static int wm8350_isink_disable(struct regulator_dev *rdev)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int isink = rdev_get_id(rdev);
switch (isink) {
case WM8350_ISINK_A:
switch (wm8350->pmic.isink_A_dcdc) {
case WM8350_DCDC_2:
case WM8350_DCDC_5:
wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
1 << (wm8350->pmic.isink_A_dcdc -
WM8350_DCDC_1));
wm8350_clear_bits(wm8350, WM8350_POWER_MGMT_7,
WM8350_CS1_ENA);
break;
default:
return -EINVAL;
}
break;
case WM8350_ISINK_B:
switch (wm8350->pmic.isink_B_dcdc) {
case WM8350_DCDC_2:
case WM8350_DCDC_5:
wm8350_clear_bits(wm8350, WM8350_DCDC_LDO_REQUESTED,
1 << (wm8350->pmic.isink_B_dcdc -
WM8350_DCDC_1));
wm8350_clear_bits(wm8350, WM8350_POWER_MGMT_7,
WM8350_CS2_ENA);
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
return 0;
}
static int wm8350_isink_is_enabled(struct regulator_dev *rdev)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int isink = rdev_get_id(rdev);
switch (isink) {
case WM8350_ISINK_A:
return wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_A) &
0x8000;
case WM8350_ISINK_B:
return wm8350_reg_read(wm8350, WM8350_CURRENT_SINK_DRIVER_B) &
0x8000;
}
return -EINVAL;
}
static int wm8350_isink_enable_time(struct regulator_dev *rdev)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int isink = rdev_get_id(rdev);
int reg;
switch (isink) {
case WM8350_ISINK_A:
reg = wm8350_reg_read(wm8350, WM8350_CSA_FLASH_CONTROL);
break;
case WM8350_ISINK_B:
reg = wm8350_reg_read(wm8350, WM8350_CSB_FLASH_CONTROL);
break;
default:
return -EINVAL;
}
if (reg & WM8350_CS1_FLASH_MODE) {
switch (reg & WM8350_CS1_ON_RAMP_MASK) {
case 0:
return 0;
case 1:
return 1950;
case 2:
return 3910;
case 3:
return 7800;
}
} else {
switch (reg & WM8350_CS1_ON_RAMP_MASK) {
case 0:
return 0;
case 1:
return 250000;
case 2:
return 500000;
case 3:
return 1000000;
}
}
return -EINVAL;
}
int wm8350_isink_set_flash(struct wm8350 *wm8350, int isink, u16 mode,
u16 trigger, u16 duration, u16 on_ramp, u16 off_ramp,
u16 drive)
{
switch (isink) {
case WM8350_ISINK_A:
wm8350_reg_write(wm8350, WM8350_CSA_FLASH_CONTROL,
(mode ? WM8350_CS1_FLASH_MODE : 0) |
(trigger ? WM8350_CS1_TRIGSRC : 0) |
duration | on_ramp | off_ramp | drive);
break;
case WM8350_ISINK_B:
wm8350_reg_write(wm8350, WM8350_CSB_FLASH_CONTROL,
(mode ? WM8350_CS2_FLASH_MODE : 0) |
(trigger ? WM8350_CS2_TRIGSRC : 0) |
duration | on_ramp | off_ramp | drive);
break;
default:
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL_GPL(wm8350_isink_set_flash);
static int wm8350_dcdc_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int sel, volt_reg, dcdc = rdev_get_id(rdev);
u16 val;
dev_dbg(wm8350->dev, "%s %d mV %d\n", __func__, dcdc, uV / 1000);
switch (dcdc) {
case WM8350_DCDC_1:
volt_reg = WM8350_DCDC1_LOW_POWER;
break;
case WM8350_DCDC_3:
volt_reg = WM8350_DCDC3_LOW_POWER;
break;
case WM8350_DCDC_4:
volt_reg = WM8350_DCDC4_LOW_POWER;
break;
case WM8350_DCDC_6:
volt_reg = WM8350_DCDC6_LOW_POWER;
break;
case WM8350_DCDC_2:
case WM8350_DCDC_5:
default:
return -EINVAL;
}
sel = regulator_map_voltage_linear(rdev, uV, uV);
if (sel < 0)
return sel;
/* all DCDCs have same mV bits */
val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_DC1_VSEL_MASK;
wm8350_reg_write(wm8350, volt_reg, val | sel);
return 0;
}
static int wm8350_dcdc_set_suspend_enable(struct regulator_dev *rdev)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int dcdc = rdev_get_id(rdev);
u16 val;
switch (dcdc) {
case WM8350_DCDC_1:
val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER)
& ~WM8350_DCDC_HIB_MODE_MASK;
wm8350_reg_write(wm8350, WM8350_DCDC1_LOW_POWER,
val | wm8350->pmic.dcdc1_hib_mode);
break;
case WM8350_DCDC_3:
val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER)
& ~WM8350_DCDC_HIB_MODE_MASK;
wm8350_reg_write(wm8350, WM8350_DCDC3_LOW_POWER,
val | wm8350->pmic.dcdc3_hib_mode);
break;
case WM8350_DCDC_4:
val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER)
& ~WM8350_DCDC_HIB_MODE_MASK;
wm8350_reg_write(wm8350, WM8350_DCDC4_LOW_POWER,
val | wm8350->pmic.dcdc4_hib_mode);
break;
case WM8350_DCDC_6:
val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER)
& ~WM8350_DCDC_HIB_MODE_MASK;
wm8350_reg_write(wm8350, WM8350_DCDC6_LOW_POWER,
val | wm8350->pmic.dcdc6_hib_mode);
break;
case WM8350_DCDC_2:
case WM8350_DCDC_5:
default:
return -EINVAL;
}
return 0;
}
static int wm8350_dcdc_set_suspend_disable(struct regulator_dev *rdev)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int dcdc = rdev_get_id(rdev);
u16 val;
switch (dcdc) {
case WM8350_DCDC_1:
val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER);
wm8350->pmic.dcdc1_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
wm8350_reg_write(wm8350, WM8350_DCDC1_LOW_POWER,
val | WM8350_DCDC_HIB_MODE_DIS);
break;
case WM8350_DCDC_3:
val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER);
wm8350->pmic.dcdc3_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
wm8350_reg_write(wm8350, WM8350_DCDC3_LOW_POWER,
val | WM8350_DCDC_HIB_MODE_DIS);
break;
case WM8350_DCDC_4:
val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER);
wm8350->pmic.dcdc4_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
wm8350_reg_write(wm8350, WM8350_DCDC4_LOW_POWER,
val | WM8350_DCDC_HIB_MODE_DIS);
break;
case WM8350_DCDC_6:
val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER);
wm8350->pmic.dcdc6_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
wm8350_reg_write(wm8350, WM8350_DCDC6_LOW_POWER,
val | WM8350_DCDC_HIB_MODE_DIS);
break;
case WM8350_DCDC_2:
case WM8350_DCDC_5:
default:
return -EINVAL;
}
return 0;
}
static int wm8350_dcdc25_set_suspend_enable(struct regulator_dev *rdev)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int dcdc = rdev_get_id(rdev);
u16 val;
switch (dcdc) {
case WM8350_DCDC_2:
val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL)
& ~WM8350_DC2_HIB_MODE_MASK;
wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val |
(WM8350_DC2_HIB_MODE_ACTIVE << WM8350_DC2_HIB_MODE_SHIFT));
break;
case WM8350_DCDC_5:
val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL)
& ~WM8350_DC5_HIB_MODE_MASK;
wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val |
(WM8350_DC5_HIB_MODE_ACTIVE << WM8350_DC5_HIB_MODE_SHIFT));
break;
default:
return -EINVAL;
}
return 0;
}
static int wm8350_dcdc25_set_suspend_disable(struct regulator_dev *rdev)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int dcdc = rdev_get_id(rdev);
u16 val;
switch (dcdc) {
case WM8350_DCDC_2:
val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL)
& ~WM8350_DC2_HIB_MODE_MASK;
wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val |
(WM8350_DC2_HIB_MODE_DISABLE << WM8350_DC2_HIB_MODE_SHIFT));
break;
case WM8350_DCDC_5:
val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL)
& ~WM8350_DC5_HIB_MODE_MASK;
wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val |
(WM8350_DC5_HIB_MODE_DISABLE << WM8350_DC5_HIB_MODE_SHIFT));
break;
default:
return -EINVAL;
}
return 0;
}
static int wm8350_dcdc_set_suspend_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int dcdc = rdev_get_id(rdev);
u16 *hib_mode;
switch (dcdc) {
case WM8350_DCDC_1:
hib_mode = &wm8350->pmic.dcdc1_hib_mode;
break;
case WM8350_DCDC_3:
hib_mode = &wm8350->pmic.dcdc3_hib_mode;
break;
case WM8350_DCDC_4:
hib_mode = &wm8350->pmic.dcdc4_hib_mode;
break;
case WM8350_DCDC_6:
hib_mode = &wm8350->pmic.dcdc6_hib_mode;
break;
case WM8350_DCDC_2:
case WM8350_DCDC_5:
default:
return -EINVAL;
}
switch (mode) {
case REGULATOR_MODE_NORMAL:
*hib_mode = WM8350_DCDC_HIB_MODE_IMAGE;
break;
case REGULATOR_MODE_IDLE:
*hib_mode = WM8350_DCDC_HIB_MODE_STANDBY;
break;
case REGULATOR_MODE_STANDBY:
*hib_mode = WM8350_DCDC_HIB_MODE_LDO_IM;
break;
default:
return -EINVAL;
}
return 0;
}
static const struct linear_range wm8350_ldo_ranges[] = {
REGULATOR_LINEAR_RANGE(900000, 0, 15, 50000),
REGULATOR_LINEAR_RANGE(1800000, 16, 31, 100000),
};
static int wm8350_ldo_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int sel, volt_reg, ldo = rdev_get_id(rdev);
u16 val;
dev_dbg(wm8350->dev, "%s %d mV %d\n", __func__, ldo, uV / 1000);
switch (ldo) {
case WM8350_LDO_1:
volt_reg = WM8350_LDO1_LOW_POWER;
break;
case WM8350_LDO_2:
volt_reg = WM8350_LDO2_LOW_POWER;
break;
case WM8350_LDO_3:
volt_reg = WM8350_LDO3_LOW_POWER;
break;
case WM8350_LDO_4:
volt_reg = WM8350_LDO4_LOW_POWER;
break;
default:
return -EINVAL;
}
sel = regulator_map_voltage_linear_range(rdev, uV, uV);
if (sel < 0)
return sel;
/* all LDOs have same mV bits */
val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_VSEL_MASK;
wm8350_reg_write(wm8350, volt_reg, val | sel);
return 0;
}
static int wm8350_ldo_set_suspend_enable(struct regulator_dev *rdev)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int volt_reg, ldo = rdev_get_id(rdev);
u16 val;
switch (ldo) {
case WM8350_LDO_1:
volt_reg = WM8350_LDO1_LOW_POWER;
break;
case WM8350_LDO_2:
volt_reg = WM8350_LDO2_LOW_POWER;
break;
case WM8350_LDO_3:
volt_reg = WM8350_LDO3_LOW_POWER;
break;
case WM8350_LDO_4:
volt_reg = WM8350_LDO4_LOW_POWER;
break;
default:
return -EINVAL;
}
/* all LDOs have same mV bits */
val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_HIB_MODE_MASK;
wm8350_reg_write(wm8350, volt_reg, val);
return 0;
}
static int wm8350_ldo_set_suspend_disable(struct regulator_dev *rdev)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int volt_reg, ldo = rdev_get_id(rdev);
u16 val;
switch (ldo) {
case WM8350_LDO_1:
volt_reg = WM8350_LDO1_LOW_POWER;
break;
case WM8350_LDO_2:
volt_reg = WM8350_LDO2_LOW_POWER;
break;
case WM8350_LDO_3:
volt_reg = WM8350_LDO3_LOW_POWER;
break;
case WM8350_LDO_4:
volt_reg = WM8350_LDO4_LOW_POWER;
break;
default:
return -EINVAL;
}
/* all LDOs have same mV bits */
val = wm8350_reg_read(wm8350, volt_reg) & ~WM8350_LDO1_HIB_MODE_MASK;
wm8350_reg_write(wm8350, volt_reg, val | WM8350_LDO1_HIB_MODE_DIS);
return 0;
}
int wm8350_dcdc_set_slot(struct wm8350 *wm8350, int dcdc, u16 start,
u16 stop, u16 fault)
{
int slot_reg;
u16 val;
dev_dbg(wm8350->dev, "%s %d start %d stop %d\n",
__func__, dcdc, start, stop);
/* slot valid ? */
if (start > 15 || stop > 15)
return -EINVAL;
switch (dcdc) {
case WM8350_DCDC_1:
slot_reg = WM8350_DCDC1_TIMEOUTS;
break;
case WM8350_DCDC_2:
slot_reg = WM8350_DCDC2_TIMEOUTS;
break;
case WM8350_DCDC_3:
slot_reg = WM8350_DCDC3_TIMEOUTS;
break;
case WM8350_DCDC_4:
slot_reg = WM8350_DCDC4_TIMEOUTS;
break;
case WM8350_DCDC_5:
slot_reg = WM8350_DCDC5_TIMEOUTS;
break;
case WM8350_DCDC_6:
slot_reg = WM8350_DCDC6_TIMEOUTS;
break;
default:
return -EINVAL;
}
val = wm8350_reg_read(wm8350, slot_reg) &
~(WM8350_DC1_ENSLOT_MASK | WM8350_DC1_SDSLOT_MASK |
WM8350_DC1_ERRACT_MASK);
wm8350_reg_write(wm8350, slot_reg,
val | (start << WM8350_DC1_ENSLOT_SHIFT) |
(stop << WM8350_DC1_SDSLOT_SHIFT) |
(fault << WM8350_DC1_ERRACT_SHIFT));
return 0;
}
EXPORT_SYMBOL_GPL(wm8350_dcdc_set_slot);
int wm8350_ldo_set_slot(struct wm8350 *wm8350, int ldo, u16 start, u16 stop)
{
int slot_reg;
u16 val;
dev_dbg(wm8350->dev, "%s %d start %d stop %d\n",
__func__, ldo, start, stop);
/* slot valid ? */
if (start > 15 || stop > 15)
return -EINVAL;
switch (ldo) {
case WM8350_LDO_1:
slot_reg = WM8350_LDO1_TIMEOUTS;
break;
case WM8350_LDO_2:
slot_reg = WM8350_LDO2_TIMEOUTS;
break;
case WM8350_LDO_3:
slot_reg = WM8350_LDO3_TIMEOUTS;
break;
case WM8350_LDO_4:
slot_reg = WM8350_LDO4_TIMEOUTS;
break;
default:
return -EINVAL;
}
val = wm8350_reg_read(wm8350, slot_reg) & ~WM8350_LDO1_SDSLOT_MASK;
wm8350_reg_write(wm8350, slot_reg, val | ((start << 10) | (stop << 6)));
return 0;
}
EXPORT_SYMBOL_GPL(wm8350_ldo_set_slot);
int wm8350_dcdc25_set_mode(struct wm8350 *wm8350, int dcdc, u16 mode,
u16 ilim, u16 ramp, u16 feedback)
{
u16 val;
dev_dbg(wm8350->dev, "%s %d mode: %s %s\n", __func__, dcdc,
mode ? "normal" : "boost", ilim ? "low" : "normal");
switch (dcdc) {
case WM8350_DCDC_2:
val = wm8350_reg_read(wm8350, WM8350_DCDC2_CONTROL)
& ~(WM8350_DC2_MODE_MASK | WM8350_DC2_ILIM_MASK |
WM8350_DC2_RMP_MASK | WM8350_DC2_FBSRC_MASK);
wm8350_reg_write(wm8350, WM8350_DCDC2_CONTROL, val |
(mode << WM8350_DC2_MODE_SHIFT) |
(ilim << WM8350_DC2_ILIM_SHIFT) |
(ramp << WM8350_DC2_RMP_SHIFT) |
(feedback << WM8350_DC2_FBSRC_SHIFT));
break;
case WM8350_DCDC_5:
val = wm8350_reg_read(wm8350, WM8350_DCDC5_CONTROL)
& ~(WM8350_DC5_MODE_MASK | WM8350_DC5_ILIM_MASK |
WM8350_DC5_RMP_MASK | WM8350_DC5_FBSRC_MASK);
wm8350_reg_write(wm8350, WM8350_DCDC5_CONTROL, val |
(mode << WM8350_DC5_MODE_SHIFT) |
(ilim << WM8350_DC5_ILIM_SHIFT) |
(ramp << WM8350_DC5_RMP_SHIFT) |
(feedback << WM8350_DC5_FBSRC_SHIFT));
break;
default:
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL_GPL(wm8350_dcdc25_set_mode);
static int force_continuous_enable(struct wm8350 *wm8350, int dcdc, int enable)
{
int reg = 0, ret;
switch (dcdc) {
case WM8350_DCDC_1:
reg = WM8350_DCDC1_FORCE_PWM;
break;
case WM8350_DCDC_3:
reg = WM8350_DCDC3_FORCE_PWM;
break;
case WM8350_DCDC_4:
reg = WM8350_DCDC4_FORCE_PWM;
break;
case WM8350_DCDC_6:
reg = WM8350_DCDC6_FORCE_PWM;
break;
default:
return -EINVAL;
}
if (enable)
ret = wm8350_set_bits(wm8350, reg,
WM8350_DCDC1_FORCE_PWM_ENA);
else
ret = wm8350_clear_bits(wm8350, reg,
WM8350_DCDC1_FORCE_PWM_ENA);
return ret;
}
static int wm8350_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int dcdc = rdev_get_id(rdev);
u16 val;
if (dcdc < WM8350_DCDC_1 || dcdc > WM8350_DCDC_6)
return -EINVAL;
if (dcdc == WM8350_DCDC_2 || dcdc == WM8350_DCDC_5)
return -EINVAL;
val = 1 << (dcdc - WM8350_DCDC_1);
switch (mode) {
case REGULATOR_MODE_FAST:
/* force continuous mode */
wm8350_set_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val);
wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
force_continuous_enable(wm8350, dcdc, 1);
break;
case REGULATOR_MODE_NORMAL:
/* active / pulse skipping */
wm8350_set_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val);
wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
force_continuous_enable(wm8350, dcdc, 0);
break;
case REGULATOR_MODE_IDLE:
/* standby mode */
force_continuous_enable(wm8350, dcdc, 0);
wm8350_clear_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
wm8350_clear_bits(wm8350, WM8350_DCDC_ACTIVE_OPTIONS, val);
break;
case REGULATOR_MODE_STANDBY:
/* LDO mode */
force_continuous_enable(wm8350, dcdc, 0);
wm8350_set_bits(wm8350, WM8350_DCDC_SLEEP_OPTIONS, val);
break;
}
return 0;
}
static unsigned int wm8350_dcdc_get_mode(struct regulator_dev *rdev)
{
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
int dcdc = rdev_get_id(rdev);
u16 mask, sleep, active, force;
int mode = REGULATOR_MODE_NORMAL;
int reg;
switch (dcdc) {
case WM8350_DCDC_1:
reg = WM8350_DCDC1_FORCE_PWM;
break;
case WM8350_DCDC_3:
reg = WM8350_DCDC3_FORCE_PWM;
break;
case WM8350_DCDC_4:
reg = WM8350_DCDC4_FORCE_PWM;
break;
case WM8350_DCDC_6:
reg = WM8350_DCDC6_FORCE_PWM;
break;
default:
return -EINVAL;
}
mask = 1 << (dcdc - WM8350_DCDC_1);
active = wm8350_reg_read(wm8350, WM8350_DCDC_ACTIVE_OPTIONS) & mask;
force = wm8350_reg_read(wm8350, reg) & WM8350_DCDC1_FORCE_PWM_ENA;
sleep = wm8350_reg_read(wm8350, WM8350_DCDC_SLEEP_OPTIONS) & mask;
dev_dbg(wm8350->dev, "mask %x active %x sleep %x force %x",
mask, active, sleep, force);
if (active && !sleep) {
if (force)
mode = REGULATOR_MODE_FAST;
else
mode = REGULATOR_MODE_NORMAL;
} else if (!active && !sleep)
mode = REGULATOR_MODE_IDLE;
else if (sleep)
mode = REGULATOR_MODE_STANDBY;
return mode;
}
static unsigned int wm8350_ldo_get_mode(struct regulator_dev *rdev)
{
return REGULATOR_MODE_NORMAL;
}
struct wm8350_dcdc_efficiency {
int uA_load_min;
int uA_load_max;
unsigned int mode;
};
static const struct wm8350_dcdc_efficiency dcdc1_6_efficiency[] = {
{0, 10000, REGULATOR_MODE_STANDBY}, /* 0 - 10mA - LDO */
{10000, 100000, REGULATOR_MODE_IDLE}, /* 10mA - 100mA - Standby */
{100000, 1000000, REGULATOR_MODE_NORMAL}, /* > 100mA - Active */
{-1, -1, REGULATOR_MODE_NORMAL},
};
static const struct wm8350_dcdc_efficiency dcdc3_4_efficiency[] = {
{0, 10000, REGULATOR_MODE_STANDBY}, /* 0 - 10mA - LDO */
{10000, 100000, REGULATOR_MODE_IDLE}, /* 10mA - 100mA - Standby */
{100000, 800000, REGULATOR_MODE_NORMAL}, /* > 100mA - Active */
{-1, -1, REGULATOR_MODE_NORMAL},
};
static unsigned int get_mode(int uA, const struct wm8350_dcdc_efficiency *eff)
{
int i = 0;
while (eff[i].uA_load_min != -1) {
if (uA >= eff[i].uA_load_min && uA <= eff[i].uA_load_max)
return eff[i].mode;
i++;
}
return REGULATOR_MODE_NORMAL;
}
/* Query the regulator for it's most efficient mode @ uV,uA
* WM8350 regulator efficiency is pretty similar over
* different input and output uV.
*/
static unsigned int wm8350_dcdc_get_optimum_mode(struct regulator_dev *rdev,
int input_uV, int output_uV,
int output_uA)
{
int dcdc = rdev_get_id(rdev), mode;
switch (dcdc) {
case WM8350_DCDC_1:
case WM8350_DCDC_6:
mode = get_mode(output_uA, dcdc1_6_efficiency);
break;
case WM8350_DCDC_3:
case WM8350_DCDC_4:
mode = get_mode(output_uA, dcdc3_4_efficiency);
break;
default:
mode = REGULATOR_MODE_NORMAL;
break;
}
return mode;
}
static const struct regulator_ops wm8350_dcdc_ops = {
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.get_mode = wm8350_dcdc_get_mode,
.set_mode = wm8350_dcdc_set_mode,
.get_optimum_mode = wm8350_dcdc_get_optimum_mode,
.set_suspend_voltage = wm8350_dcdc_set_suspend_voltage,
.set_suspend_enable = wm8350_dcdc_set_suspend_enable,
.set_suspend_disable = wm8350_dcdc_set_suspend_disable,
.set_suspend_mode = wm8350_dcdc_set_suspend_mode,
};
static const struct regulator_ops wm8350_dcdc2_5_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_suspend_enable = wm8350_dcdc25_set_suspend_enable,
.set_suspend_disable = wm8350_dcdc25_set_suspend_disable,
};
static const struct regulator_ops wm8350_ldo_ops = {
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.get_mode = wm8350_ldo_get_mode,
.set_suspend_voltage = wm8350_ldo_set_suspend_voltage,
.set_suspend_enable = wm8350_ldo_set_suspend_enable,
.set_suspend_disable = wm8350_ldo_set_suspend_disable,
};
static const struct regulator_ops wm8350_isink_ops = {
.set_current_limit = regulator_set_current_limit_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
.enable = wm8350_isink_enable,
.disable = wm8350_isink_disable,
.is_enabled = wm8350_isink_is_enabled,
.enable_time = wm8350_isink_enable_time,
};
static const struct regulator_desc wm8350_reg[NUM_WM8350_REGULATORS] = {
{
.name = "DCDC1",
.id = WM8350_DCDC_1,
.ops = &wm8350_dcdc_ops,
.irq = WM8350_IRQ_UV_DC1,
.type = REGULATOR_VOLTAGE,
.n_voltages = WM8350_DCDC_MAX_VSEL + 1,
.min_uV = 850000,
.uV_step = 25000,
.vsel_reg = WM8350_DCDC1_CONTROL,
.vsel_mask = WM8350_DC1_VSEL_MASK,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
.enable_mask = WM8350_DC1_ENA,
.owner = THIS_MODULE,
},
{
.name = "DCDC2",
.id = WM8350_DCDC_2,
.ops = &wm8350_dcdc2_5_ops,
.irq = WM8350_IRQ_UV_DC2,
.type = REGULATOR_VOLTAGE,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
.enable_mask = WM8350_DC2_ENA,
.owner = THIS_MODULE,
},
{
.name = "DCDC3",
.id = WM8350_DCDC_3,
.ops = &wm8350_dcdc_ops,
.irq = WM8350_IRQ_UV_DC3,
.type = REGULATOR_VOLTAGE,
.n_voltages = WM8350_DCDC_MAX_VSEL + 1,
.min_uV = 850000,
.uV_step = 25000,
.vsel_reg = WM8350_DCDC3_CONTROL,
.vsel_mask = WM8350_DC3_VSEL_MASK,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
.enable_mask = WM8350_DC3_ENA,
.owner = THIS_MODULE,
},
{
.name = "DCDC4",
.id = WM8350_DCDC_4,
.ops = &wm8350_dcdc_ops,
.irq = WM8350_IRQ_UV_DC4,
.type = REGULATOR_VOLTAGE,
.n_voltages = WM8350_DCDC_MAX_VSEL + 1,
.min_uV = 850000,
.uV_step = 25000,
.vsel_reg = WM8350_DCDC4_CONTROL,
.vsel_mask = WM8350_DC4_VSEL_MASK,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
.enable_mask = WM8350_DC4_ENA,
.owner = THIS_MODULE,
},
{
.name = "DCDC5",
.id = WM8350_DCDC_5,
.ops = &wm8350_dcdc2_5_ops,
.irq = WM8350_IRQ_UV_DC5,
.type = REGULATOR_VOLTAGE,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
.enable_mask = WM8350_DC5_ENA,
.owner = THIS_MODULE,
},
{
.name = "DCDC6",
.id = WM8350_DCDC_6,
.ops = &wm8350_dcdc_ops,
.irq = WM8350_IRQ_UV_DC6,
.type = REGULATOR_VOLTAGE,
.n_voltages = WM8350_DCDC_MAX_VSEL + 1,
.min_uV = 850000,
.uV_step = 25000,
.vsel_reg = WM8350_DCDC6_CONTROL,
.vsel_mask = WM8350_DC6_VSEL_MASK,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
.enable_mask = WM8350_DC6_ENA,
.owner = THIS_MODULE,
},
{
.name = "LDO1",
.id = WM8350_LDO_1,
.ops = &wm8350_ldo_ops,
.irq = WM8350_IRQ_UV_LDO1,
.type = REGULATOR_VOLTAGE,
.n_voltages = WM8350_LDO1_VSEL_MASK + 1,
.linear_ranges = wm8350_ldo_ranges,
.n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
.vsel_reg = WM8350_LDO1_CONTROL,
.vsel_mask = WM8350_LDO1_VSEL_MASK,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
.enable_mask = WM8350_LDO1_ENA,
.owner = THIS_MODULE,
},
{
.name = "LDO2",
.id = WM8350_LDO_2,
.ops = &wm8350_ldo_ops,
.irq = WM8350_IRQ_UV_LDO2,
.type = REGULATOR_VOLTAGE,
.n_voltages = WM8350_LDO2_VSEL_MASK + 1,
.linear_ranges = wm8350_ldo_ranges,
.n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
.vsel_reg = WM8350_LDO2_CONTROL,
.vsel_mask = WM8350_LDO2_VSEL_MASK,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
.enable_mask = WM8350_LDO2_ENA,
.owner = THIS_MODULE,
},
{
.name = "LDO3",
.id = WM8350_LDO_3,
.ops = &wm8350_ldo_ops,
.irq = WM8350_IRQ_UV_LDO3,
.type = REGULATOR_VOLTAGE,
.n_voltages = WM8350_LDO3_VSEL_MASK + 1,
.linear_ranges = wm8350_ldo_ranges,
.n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
.vsel_reg = WM8350_LDO3_CONTROL,
.vsel_mask = WM8350_LDO3_VSEL_MASK,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
.enable_mask = WM8350_LDO3_ENA,
.owner = THIS_MODULE,
},
{
.name = "LDO4",
.id = WM8350_LDO_4,
.ops = &wm8350_ldo_ops,
.irq = WM8350_IRQ_UV_LDO4,
.type = REGULATOR_VOLTAGE,
.n_voltages = WM8350_LDO4_VSEL_MASK + 1,
.linear_ranges = wm8350_ldo_ranges,
.n_linear_ranges = ARRAY_SIZE(wm8350_ldo_ranges),
.vsel_reg = WM8350_LDO4_CONTROL,
.vsel_mask = WM8350_LDO4_VSEL_MASK,
.enable_reg = WM8350_DCDC_LDO_REQUESTED,
.enable_mask = WM8350_LDO4_ENA,
.owner = THIS_MODULE,
},
{
.name = "ISINKA",
.id = WM8350_ISINK_A,
.ops = &wm8350_isink_ops,
.irq = WM8350_IRQ_CS1,
.type = REGULATOR_CURRENT,
.owner = THIS_MODULE,
.curr_table = isink_cur,
.n_current_limits = ARRAY_SIZE(isink_cur),
.csel_reg = WM8350_CURRENT_SINK_DRIVER_A,
.csel_mask = WM8350_CS1_ISEL_MASK,
},
{
.name = "ISINKB",
.id = WM8350_ISINK_B,
.ops = &wm8350_isink_ops,
.irq = WM8350_IRQ_CS2,
.type = REGULATOR_CURRENT,
.owner = THIS_MODULE,
.curr_table = isink_cur,
.n_current_limits = ARRAY_SIZE(isink_cur),
.csel_reg = WM8350_CURRENT_SINK_DRIVER_B,
.csel_mask = WM8350_CS2_ISEL_MASK,
},
};
static irqreturn_t pmic_uv_handler(int irq, void *data)
{
struct regulator_dev *rdev = (struct regulator_dev *)data;
if (irq == WM8350_IRQ_CS1 || irq == WM8350_IRQ_CS2)
regulator_notifier_call_chain(rdev,
REGULATOR_EVENT_REGULATION_OUT,
NULL);
else
regulator_notifier_call_chain(rdev,
REGULATOR_EVENT_UNDER_VOLTAGE,
NULL);
return IRQ_HANDLED;
}
static int wm8350_regulator_probe(struct platform_device *pdev)
{
struct wm8350 *wm8350 = dev_get_drvdata(&pdev->dev);
struct regulator_config config = { };
struct regulator_dev *rdev;
int ret;
u16 val;
if (pdev->id < WM8350_DCDC_1 || pdev->id > WM8350_ISINK_B)
return -ENODEV;
/* do any regulator specific init */
switch (pdev->id) {
case WM8350_DCDC_1:
val = wm8350_reg_read(wm8350, WM8350_DCDC1_LOW_POWER);
wm8350->pmic.dcdc1_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
break;
case WM8350_DCDC_3:
val = wm8350_reg_read(wm8350, WM8350_DCDC3_LOW_POWER);
wm8350->pmic.dcdc3_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
break;
case WM8350_DCDC_4:
val = wm8350_reg_read(wm8350, WM8350_DCDC4_LOW_POWER);
wm8350->pmic.dcdc4_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
break;
case WM8350_DCDC_6:
val = wm8350_reg_read(wm8350, WM8350_DCDC6_LOW_POWER);
wm8350->pmic.dcdc6_hib_mode = val & WM8350_DCDC_HIB_MODE_MASK;
break;
}
config.dev = &pdev->dev;
config.init_data = dev_get_platdata(&pdev->dev);
config.driver_data = dev_get_drvdata(&pdev->dev);
config.regmap = wm8350->regmap;
/* register regulator */
rdev = devm_regulator_register(&pdev->dev, &wm8350_reg[pdev->id],
&config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "failed to register %s\n",
wm8350_reg[pdev->id].name);
return PTR_ERR(rdev);
}
/* register regulator IRQ */
ret = wm8350_register_irq(wm8350, wm8350_reg[pdev->id].irq,
pmic_uv_handler, 0, "UV", rdev);
if (ret < 0) {
dev_err(&pdev->dev, "failed to register regulator %s IRQ\n",
wm8350_reg[pdev->id].name);
return ret;
}
return 0;
}
static int wm8350_regulator_remove(struct platform_device *pdev)
{
struct regulator_dev *rdev = platform_get_drvdata(pdev);
struct wm8350 *wm8350 = rdev_get_drvdata(rdev);
wm8350_free_irq(wm8350, wm8350_reg[pdev->id].irq, rdev);
return 0;
}
int wm8350_register_regulator(struct wm8350 *wm8350, int reg,
struct regulator_init_data *initdata)
{
struct platform_device *pdev;
int ret;
if (reg < 0 || reg >= NUM_WM8350_REGULATORS)
return -EINVAL;
if (wm8350->pmic.pdev[reg])
return -EBUSY;
if (reg >= WM8350_DCDC_1 && reg <= WM8350_DCDC_6 &&
reg > wm8350->pmic.max_dcdc)
return -ENODEV;
if (reg >= WM8350_ISINK_A && reg <= WM8350_ISINK_B &&
reg > wm8350->pmic.max_isink)
return -ENODEV;
pdev = platform_device_alloc("wm8350-regulator", reg);
if (!pdev)
return -ENOMEM;
wm8350->pmic.pdev[reg] = pdev;
initdata->driver_data = wm8350;
pdev->dev.platform_data = initdata;
pdev->dev.parent = wm8350->dev;
platform_set_drvdata(pdev, wm8350);
ret = platform_device_add(pdev);
if (ret != 0) {
dev_err(wm8350->dev, "Failed to register regulator %d: %d\n",
reg, ret);
platform_device_put(pdev);
wm8350->pmic.pdev[reg] = NULL;
}
return ret;
}
EXPORT_SYMBOL_GPL(wm8350_register_regulator);
/**
* wm8350_register_led - Register a WM8350 LED output
*
* @wm8350: The WM8350 device to configure.
* @lednum: LED device index to create.
* @dcdc: The DCDC to use for the LED.
* @isink: The ISINK to use for the LED.
* @pdata: Configuration for the LED.
*
* The WM8350 supports the use of an ISINK together with a DCDC to
* provide a power-efficient LED driver. This function registers the
* regulators and instantiates the platform device for a LED. The
* operating modes for the LED regulators must be configured using
* wm8350_isink_set_flash(), wm8350_dcdc25_set_mode() and
* wm8350_dcdc_set_slot() prior to calling this function.
*/
int wm8350_register_led(struct wm8350 *wm8350, int lednum, int dcdc, int isink,
struct wm8350_led_platform_data *pdata)
{
struct wm8350_led *led;
struct platform_device *pdev;
int ret;
if (lednum >= ARRAY_SIZE(wm8350->pmic.led) || lednum < 0) {
dev_err(wm8350->dev, "Invalid LED index %d\n", lednum);
return -ENODEV;
}
led = &wm8350->pmic.led[lednum];
if (led->pdev) {
dev_err(wm8350->dev, "LED %d already allocated\n", lednum);
return -EINVAL;
}
pdev = platform_device_alloc("wm8350-led", lednum);
if (pdev == NULL) {
dev_err(wm8350->dev, "Failed to allocate LED %d\n", lednum);
return -ENOMEM;
}
led->isink_consumer.dev_name = dev_name(&pdev->dev);
led->isink_consumer.supply = "led_isink";
led->isink_init.num_consumer_supplies = 1;
led->isink_init.consumer_supplies = &led->isink_consumer;
led->isink_init.constraints.min_uA = 0;
led->isink_init.constraints.max_uA = pdata->max_uA;
led->isink_init.constraints.valid_ops_mask
= REGULATOR_CHANGE_CURRENT | REGULATOR_CHANGE_STATUS;
led->isink_init.constraints.valid_modes_mask = REGULATOR_MODE_NORMAL;
ret = wm8350_register_regulator(wm8350, isink, &led->isink_init);
if (ret != 0) {
platform_device_put(pdev);
return ret;
}
led->dcdc_consumer.dev_name = dev_name(&pdev->dev);
led->dcdc_consumer.supply = "led_vcc";
led->dcdc_init.num_consumer_supplies = 1;
led->dcdc_init.consumer_supplies = &led->dcdc_consumer;
led->dcdc_init.constraints.valid_modes_mask = REGULATOR_MODE_NORMAL;
led->dcdc_init.constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS;
ret = wm8350_register_regulator(wm8350, dcdc, &led->dcdc_init);
if (ret != 0) {
platform_device_put(pdev);
return ret;
}
switch (isink) {
case WM8350_ISINK_A:
wm8350->pmic.isink_A_dcdc = dcdc;
break;
case WM8350_ISINK_B:
wm8350->pmic.isink_B_dcdc = dcdc;
break;
}
pdev->dev.platform_data = pdata;
pdev->dev.parent = wm8350->dev;
ret = platform_device_add(pdev);
if (ret != 0) {
dev_err(wm8350->dev, "Failed to register LED %d: %d\n",
lednum, ret);
platform_device_put(pdev);
return ret;
}
led->pdev = pdev;
return 0;
}
EXPORT_SYMBOL_GPL(wm8350_register_led);
static struct platform_driver wm8350_regulator_driver = {
.probe = wm8350_regulator_probe,
.remove = wm8350_regulator_remove,
.driver = {
.name = "wm8350-regulator",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
};
static int __init wm8350_regulator_init(void)
{
return platform_driver_register(&wm8350_regulator_driver);
}
subsys_initcall(wm8350_regulator_init);
static void __exit wm8350_regulator_exit(void)
{
platform_driver_unregister(&wm8350_regulator_driver);
}
module_exit(wm8350_regulator_exit);
/* Module information */
MODULE_AUTHOR("Liam Girdwood");
MODULE_DESCRIPTION("WM8350 voltage and current regulator driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm8350-regulator");
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